The most common mistake to make when reassembling the Delica and Endura is to put all the innards on one scale, and then close it up with the other scale. This doesn't work. The reason for this is that the plastic backspacer has a notch on each side that goes into a little hole in the liners. For these notches to go into the liners, there must be 0 tension, i.e. the blade and spring must not be in at the same time with only one scale present.
The following gets me good results (and I just happened to do this last weekend for the first time in a while; blasting with water + adding oil gets the job done most of the time) :
1. Put the liner into the face scale (the scale that's on the same side as the logo side of the blade.
2. Put all of the D-bolts onto the face scale, except for the lock bar's D-bolt.
3. Put the backspacer in.
4. Put the blade in with its washers (oil as needed.)
5. Put the spring into place.
6. Put the back liner and scale in.
7. Screw everything shut, except don't screw the pivot in all the way.
Now for the tricky part:
8. Making sure that the blade is held at about the "open" position, place the lockbar's D-bolt into the face scale so that it does NOT protrude passed the scale and liner (so that it does not reach "into" the body of the knife.)
9. Insert the lockbar until its hole is lined up with the D-bolt's slot.
10. Assuming you have kept everything low and near the table, use the table to push the D-bolt all the way through.
And then go ahead and attach your clip and tighten the pivot to your liking.
A few tightening tips:
1. Just get the lockbar's pivot so that it's firm. Overtightening this particular torx screw can cause your Delica to not feel right when opening and closing.
2. You might like to tighten the pivot a little bit, check for play, tighten again, and do this together with the pivot screw until you find the right balance between the two.
I hope this helps.